Gradient overlay for constrained window

ui/base/animation/animation_unittest.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/base/animation/linear_animation.h"
 #include "ui/base/animation/test_animation_delegate.h"
 
 #if defined(OS_WIN)
@@ skipping 125 matching lines @@
   } else {
     // On XP, the function should check the SM_REMOTESESSION value.
     EXPECT_EQ(!::GetSystemMetrics(SM_REMOTESESSION),
               Animation::ShouldRenderRichAnimation());
   }
 #else
   EXPECT_TRUE(Animation::ShouldRenderRichAnimation());
 #endif
 }
 
+// Test that current value is always 0 after Start() is called.
+TEST_F(AnimationTest, StartState) {
+  LinearAnimation animation(100, 60, NULL);
+  EXPECT_EQ(0.0, animation.GetCurrentValue());
+  animation.Start();
+  EXPECT_EQ(0.0, animation.GetCurrentValue());
+  animation.End();
+  EXPECT_EQ(1.0, animation.GetCurrentValue());
+  animation.Start();
+  EXPECT_EQ(0.0, animation.GetCurrentValue());
+}
+
 }  // namespace ui